When a married man tells his wife everything, causing her to think less of her husbands friends. This is a nickname like Johnny On the spot, Charlie Hustle, Joe Bag-a-Donuts.
" Hey no one would have found out we were at the strip club if 'Benny Big Mouth' hadn't told his wife."
by Jack Cutone September 29, 2005
Get the Benny Big Mouthmug.